The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 1990
Filed:
Aug. 30, 1989
Michael T Braski, Carlsbad, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
Frequency stabilization in an RF excited carbon dioxide waveguide laser (10, 110, 210, 310) is obtained by employing as an imput to a dither stabilization feedback circuit (24, 124, 224, 324) an RF return power signal (62) that is a reflection of the exciting RF signal caused by mismatch of RF power source (14, 114, 214, 314) impedance and impedance of the laser cavity. The laser is operated so as to keep the RF return power from having its minimum magnitude. By employing an RF return power signal that is never at its minimum value, the system is insensitive to a wide range of thermal variation, and need for an optical laser output power sensor is eliminated.